I've been making & painting this in bits & bats for a few months now (since I did the sniper)
Its an Objective marker for the demolition mission in Bolt Action, it's made from plasticard & plastic box, the sand bags are a resin piece from the defunct Crusader 36 with the Phone box & figures the usual Foundry pieces, with the guy on the phone made up from the leftover bits from making the sniper.
I have based it on a scene from the Dad's Army episode 'The Lion Has Phones' where they all have to learn how to make a phone call.
I may add some more figures etc. at some point.